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ghost 6.21.2: known vulnerabilities

Known vulnerabilities affecting ghost 6.21.2: 25. Compare the fixes below with your installed release.

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Vulnerabilities: 25

  1. CVE-2026-105680

    Medium · CVSS 6.5EPSS 0.27%Fix available

    Ghost: Authorization Issue Allowed Author Role to Delete any Post

    Ghost is a Node.js content management system. From 5.81.0 until 6.60.0, staff with the Author role could delete posts and pages that they did not author. This issue is fixed in version 6.60.0.

    • Update to 6.60.0
    Published Updated
  2. CVE-2026-105649

    High · CVSS 7.3EPSS 0.3%Fix available

    Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

    Ghost is a Node.js content management system. From 4.22.0 until 6.65.0, SVG media thumbnails and SVG images uploaded with a non-SVG file extension were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions. This issue is fixed in version 6.65.0.

    • Update to 6.65.0
    Published Updated
  3. CVE-2026-105648

    Medium · CVSS 4.0EPSS 0.3%Fix available

    Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses

    Ghost is a Node.js content management system. From 6.0.9 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network on some network configurations. A successful attack would not result in any response data being returned. This issue is fixed in version 6.65.0.

    • Update to 6.65.0
    Published Updated
  4. CVE-2026-105646

    Medium · CVSS 4.9EPSS 0.33%Fix available

    Ghost: Regular Expression Denial of Service in Content Import

    Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, a crafted content import file could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

    • Update to 6.67.0
    Published Updated
  5. CVE-2026-105645

    Medium · CVSS 4.9EPSS 0.33%Fix available

    Ghost: Regular Expression Denial of Service in External Media Inliner

    Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

    • Update to 6.67.0
    Published Updated
  6. CVE-2026-105644

    Medium · CVSS 6.8EPSS 0.32%Fix available

    Ghost: Stored XSS via SVG Files in Content Imports

    Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, SVG images included in content imports were stored without sanitization. An attacker who convinced an Administrator to import a crafted file could host scripts on the site's domain, possibly resulting in compromise of staff users' admin sessions. This issue is fixed in version 6.67.0.

    • Update to 6.67.0
    Published Updated
  7. CVE-2026-104418

    High · CVSS 8.6EPSS 0.65%Fix available

    Ghost from 6.10.3 before 6.64.0 RCE via Theme Translation Files

    Ghost from 6.10.3 before 6.64.0 contains a remote code execution vulnerability that allows authenticated administrators to run code by abusing theme translation file loading. Attackers with administrator access can upload a crafted theme containing malicious translation files to execute arbitrary code on the Ghost server.

    • Update to 6.64.0
    Published Updated
  8. CVE-2026-104417

    Medium · CVSS 6.9EPSS 0.37%Fix available

    Ghost 1.20.0 before 6.64.0 Path Traversal via Locale Setting

    Ghost from 1.20.0 before 6.64.0 contains a path traversal vulnerability in theme translation file loading that allows authenticated administrators to read JSON files outside the active theme directory. Attackers can manipulate the locale setting to load JSON files elsewhere on the server, exposing server configuration secrets.

    • Update to 6.64.0
    Published Updated
  9. CVE-2026-104416

    High · CVSS 7.7EPSS 0.31%Fix available

    Ghost 4.39.0 before 6.64.0 Invite Token Disclosure via Admin API

    Ghost from 4.39.0 before 6.64.0 contains an information disclosure vulnerability in the Admin API that allows staff users to view secret tokens of pending staff invites. Staff users with invite viewing permission can accept pending invites for higher-privileged roles to escalate their privileges.

    • Update to 6.64.0
    Published Updated
  10. CVE-2026-104415

    Low · CVSS 2.3EPSS 0.21%Fix available

    Ghost 0.7.2 before 6.64.0 Password Hash Ordering Disclosure via Admin API

    Ghost from 0.7.2 before 6.64.0 contains an information disclosure vulnerability in the Admin API that allows staff-level users to determine the relative ordering of other staff users' password hashes. Authenticated staff users can query the Admin API to infer hash ordering, though this does not directly reveal hashes or enable practical password recovery.

    • Update to 6.64.0
    Published Updated
  11. CVE-2026-104414

    High · CVSS 8.6EPSS 0.28%Fix available

    Ghost from 2.5.0 before 6.64.0 Stored XSS via oEmbed Photo Responses

    Ghost from 2.5.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows attackers to inject untrusted scripts into post content via oEmbed photo responses. Attackers can host malicious oEmbed photo responses so that embedding their URL stores scripts that run in the Ghost editor, published site, and newsletter emails, compromising staff admin sessions.

    • Update to 6.64.0
    Published Updated
  12. CVE-2026-104413

    High · CVSS 8.5EPSS 0.26%Fix available

    Ghost 5.94.0 before 6.64.0 Stored XSS via Bookmark Card Images

    Ghost from 5.94.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows staff users, including Contributors, to host arbitrary HTML by abusing bookmark card image fetching. Attackers can create bookmark cards that store non-image files from external websites as icons or thumbnails to compromise other staff users' admin sessions.

    • Update to 6.64.0
    Published Updated
  13. CVE-2026-104412

    Medium · CVSS 5.3EPSS 0.19%Fix available

    Ghost 0.5.0 before 6.64.0 Privilege Escalation via Staff Role Assignment

    Ghost 0.5.0 before 6.64.0 does not correctly restrict staff role assignment, allowing users with the Editor or Super Editor role to assign their own role to other staff despite lacking permission to do so. An authenticated Editor or Super Editor can promote Author and Contributor users to Editor or Super Editor.

    • Update to 6.64.0
    Published Updated
  14. CVE-2026-103290

    Medium · CVSS 5.1EPSS 0.27%Fix available

    Ghost 6.14.0 before 6.27.0 Path Traversal via ImageSize

    Ghost versions 6.14.0 through versions prior to 6.27.0 contain a path traversal vulnerability in the ImageSize service. Insufficient input validation of user-supplied file paths may allow authenticated staff users to access local files outside the intended data storage directories on the server.

    • Update to 6.27.0
    Published Updated
  15. CVE-2026-103289

    High · CVSS 7.1EPSS 0.23%Fix available

    Ghost 5.9.0 before 6.44.1 Authorization Bypass via Comments

    Ghost from 5.9.0 before 6.44.1 contains an input validation issue in the comments feature that allows authenticated members to access comments they are not authorized to view, resulting in disclosure of restricted comment data.

    • Update to 6.44.1
    Published Updated
  16. CVE-2026-103287

    Medium · CVSS 5.1EPSS 0.2%Fix available

    Ghost 1.18.0 before 6.27.0 Server-Side Request Forgery via Webhook

    Ghost versions 1.18.0 before 6.27.0 contain a server-side request forgery vulnerability in the webhooks feature that allows staff users to probe internal hosts. Attackers with staff privileges can craft webhook requests to access internal network resources from the Ghost server.

    • Update to 6.27.0
    Published Updated
  17. CVE-2026-70596

    Medium · CVSS 4.3EPSS 0.32%Fix available

    Ghost: Cross-Site Scripting in Feature Image Captions

    Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.

    • Update to 6.54.1
    Published Updated
  18. CVE-2026-70594

    Medium · CVSS 6.7EPSS 0.24%Fix available

    Ghost: Session Fixation in Ghost Admin

    Ghost is a Node.js content management system. From 2.2.0 until 6.54.1, Ghost Admin did not invalidate existing sessions on login which could have allowed for session fixation attacks. Successful exploitation would have required another vulnerability on the same domain where Ghost Admin was hosted. This issue is fixed in version 6.54.1.

    • Update to 6.54.1
    Published Updated
  19. CVE-2026-70593

    Medium · CVSS 6.6EPSS 0.41%Fix available

    Ghost: Theme Upload Path Traversal

    Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation through custom theme upload path traversal in LocalStorageBase and theme storage name handling. This issue is fixed in version 6.54.1.

    • Update to 6.54.1
    Published Updated
  20. CVE-2026-70592

    Medium · CVSS 5.5EPSS 0.44%Fix available

    Ghost: Database Backup Path Traversal

    Ghost is a Node.js content management system. From 1.20.1 until 6.54.1, an Administrator-level user could remotely overwrite certain files on the filesystem through the database backup filename, leading to integrity and availability issues. The database export endpoint failed to reject path separators in the caller-supplied filename. This issue is fixed in version 6.54.1.

    • Update to 6.54.1
    Published Updated

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